1. Picard, R.: Affective Computing. The MIT Press, Cambridge (2007) ISBN 0-262-16170-2
2. Cowie, R. (coordinator): EU-IST Network of Excellence HUMAINE (The Human Machine Interaction Network on Emotion) (2004-2007), emotion-research.net
3. Wilks, Y. (coordinator): EU-IST Integrated Project IST-34434 COMPANIONS (2006-2010), companions-project.org
4. Lecture Notes in Artificial Intelligence;A. Wendemuth,2008
5. Ghallab, M., Nau, D., Traverso, P.: Automated Planning: Theory & Practice. Morgan Kaufmann Publishers Inc., San Francisco (2004) ISBN 1558608567